added tables stable_id_event and mapping_session
added tables stable_id_event and mapping_session

mjg17/ensembl,at7/ensembl,mjg17/ensembl,Ensembl/ensembl,Ensembl/ensembl,danstaines/ensembl,james-monkeyshines/ensembl,Ensembl/ensembl,james-monkeyshines/ensembl,muffato/ensembl,muffato/ensembl,willmclaren/ensembl,at7/ensembl,muffato/ensembl,danstaines/ensembl,Ensembl/ensembl,mjg17/ensembl,at7/ensembl,willmclaren/ensembl,james-monkeyshines/ensembl,james-monkeyshines/ensembl,danstaines/ensembl,muffato/ensembl,mjg17/ensembl,at7/ensembl